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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	File: screen.h
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	9/90
+ *
+ *	Definitions for the Generic Screen Driver.
+ */
+
+/*
+ * Most of these structures are defined so that the
+ * resulting structure mapped to user space appears
+ * to be compatible with the one used by the DEC X
+ * servers (pm_info..). Keep it that way and the
+ * X servers will keep on running.
+ */
+
+/*
+ * Generic structures and defines
+ */
+
+/* colors */
+typedef struct {
+	unsigned short	red;
+	unsigned short	green;
+	unsigned short	blue;
+} color_map_t;
+
+typedef struct {
+	short		unused;
+	unsigned short	index;
+	color_map_t	value;
+} color_map_entry_t;
+
+typedef struct {
+	unsigned int	Bg_rgb[3];
+	unsigned int	Fg_rgb[3];
+} cursor_color_t;
+
+/* generic input event */
+typedef struct {
+        short	        x;		/* x position */
+        short 	        y;		/* y position */
+        unsigned int    time;		/* 1 millisecond units */
+
+        unsigned char   type;		/* button up/down/raw or motion */
+#	define	EVT_BUTTON_UP		0
+#	define	EVT_BUTTON_DOWN		1
+#	define	EVT_BUTTON_RAW		2
+#	define	EVT_PTR_MOTION		3
+
+        unsigned char   key;		/* the key (button only) */
+#	define	KEY_LEFT_BUTTON		1
+#	define	KEY_MIDDLE_BUTTON	2
+#	define	KEY_RIGHT_BUTTON	3
+#	define	KEY_TBL_LEFT_BUTTON	0
+#	define	KEY_TBL_FRONT_BUTTON	1
+#	define	KEY_TBL_RIGHT_BUTTON	2
+#	define	KEY_TBL_BACK_BUTTON	3
+
+        unsigned char   index;		/* which instance of device */
+
+        unsigned char   device;		/* which device */
+#	define	DEV_NULL		0
+#	define	DEV_MOUSE		1
+#	define	DEV_KEYBD		2
+#	define	DEV_TABLET		3
+#	define	DEV_AUX			4
+#	define	DEV_CONSOLE		5
+#	define	DEV_KNOB		8
+#	define	DEV_JOYSTICK		9
+
+} screen_event_t;
+
+/* timed coordinate info */
+typedef struct {
+	unsigned int	time;
+	short		x, y;
+} screen_timed_point_t;
+
+/* queue of input events, and ring of mouse motions track */
+typedef struct {
+	screen_event_t 	*events;
+	unsigned int 	q_size;
+        unsigned int    q_head;
+        unsigned int    q_tail;
+	unsigned	long	timestamp;
+	screen_timed_point_t	*track;
+	unsigned int	t_size;
+	unsigned int	t_next;
+} screen_evque_t;
+
+/* mouse/cursor position */
+typedef struct {
+        short x;
+        short y;
+} screen_point_t;
+
+/* mouse motion bounding boxes */
+typedef struct {
+        short bottom;
+        short right;
+        short left;
+        short top;
+} screen_rect_t;
+
+/*
+ * Here it is, each field is marked as
+ *
+ * Kset	: kernel sets it unconditionally
+ * Kuse : kernel uses it, safely
+ * Kdep : kernel might depend on it
+ */
+typedef struct {
+  screen_evque_t	evque;		/* Kset, Kuse */
+  short			mouse_buttons;	/* Kset */
+  screen_point_t 	xx3	/*tablet*/;
+  short			xx4	/*tswitches*/;
+  screen_point_t 	cursor;		/* Kset */
+  short			row;		/* Kdep */
+  short			col;		/* Kdep */
+  short			max_row;	/* Kdep */
+  short			max_col;	/* Kdep */
+  short			max_x;		/* Kset */
+  short			max_y;		/* Kset */
+  short			max_cur_x;	/* Kdep */
+  short			max_cur_y;	/* Kdep */
+  int			version;	/* Kset */
+  union {
+    struct {
+	unsigned char *	bitmap;		/* Kset */
+	short *		x16	/*scanmap*/;
+	short *		x17	/*cursorbits*/;
+	short *		x18	/*pmaddr*/;
+	unsigned char *	planemask;	/* Kset */
+    } pm;
+    struct {
+	int		x15	/* flags */;
+	int *		gram	/* Kset */;
+	int *		rb_addr	/* Kset */;
+	int		rb_phys	/* Kset */;
+	int		rb_size	/* Kset */;
+    } gx;
+  } dev_dep_1;
+  screen_point_t 	mouse_loc;	/* Kdep */
+  screen_rect_t		mouse_box;	/* Kdep */
+  short			mouse_threshold;/* Kuse */
+  short			mouse_scale;	/* Kuse */
+  short			min_cur_x;	/* Kdep */
+  short			min_cur_y;	/* Kdep */
+  union {
+    struct {
+	int		x26	/*dev_type*/;
+	char *		x27	/*framebuffer*/;
+	char *		x28	/*volatile struct bt459 *bt459*/;
+	int		x29	/*slot*/;
+	char		cursor_sprite[1024];/* Kset */
+	unsigned char	Bg_color[3];	/* Kset */
+	unsigned char	Fg_color[3];	/* Kset */
+	int		tablet_scale_x;	/* Kuse */
+	int 		tablet_scale_y;	/* Kuse */
+    } pm;
+    struct {
+	char *		gxo		/* Kset */;
+	char		stamp_width	/* Kset */;
+	char		stamp_height	/* Kset */;
+	char		nplanes		/* Kset */;
+	char		x27_4	/* n10_present */;
+	char		x28_1	/* dplanes */;
+	char		zplanes		/* Kset */;
+	char		zzplanes	/* Kset */;
+	unsigned char	cursor_sprite[1024]	/* Kuse */;
+	char		x285_0		/* padding for next, which was int */;
+	unsigned char	Fg_color[4]	/* Kuse */;
+	unsigned char	Bg_color[4]	/* Kuse */;
+	unsigned short	cmap_index	/* Kuse */;
+	unsigned short	cmap_count	/* Kuse */;
+	unsigned int	colormap[256]	/* Kuse */;
+	int *		stic_dma_rb	/* Kset */;
+	int *		stic_reg	/* Kset */;
+	int		ptpt_phys	/* Kdep */;
+	int		ptpt_size	/* Kdep */;
+	int *		ptpt_pgin	/* Kset */;
+    } gx;
+  } dev_dep_2;
+  short		frame_scanline_width;	/* in pixels, Kset */
+  short		frame_height;		/* in scanlines, Kset */
+  /*
+   * Event queues are allocated right after that
+   */
+#define	MAX_EVENTS	64
+#define	MAX_TRACK	100
+  screen_event_t	event_queue[MAX_EVENTS]; /* Kset */
+  screen_timed_point_t	point_track[MAX_TRACK];  /* Kset */
+  /*
+   * Some like it hot
+   */
+  unsigned int		event_id;
+  int			interrupt_info;
+} user_info_t;
+
+
+/*
+ * Screen get_status codes and arguments
+ */
+#include <sys/ioctl.h>
+
+	/* Get size (and offset) of mapped info */
+#define	SCREEN_GET_OFFSETS	_IOR('q', 6, unsigned **)
+
+	/* Get screen status flags */
+#define SCREEN_STATUS_FLAGS	_IOR('q', 22, int *)
+#	define	MONO_SCREEN	0x01
+#	define	COLOR_SCREEN	0x02
+#	define	SCREEN_BEING_UPDATED 0x04
+
+/*
+ * Screen set_status codes and arguments
+ */
+
+	/* start/stop screen saver, control fading interval */
+#define	SCREEN_FADE		_IOW('q', 114, int)	/* fade screen */
+#	define	NO_FADE		-1
+
+	/* Turn video on/off manually */
+#define SCREEN_ON		_IO('q', 10)
+#define	SCREEN_OFF		_IO('q', 11)
+
+	/* Fixup pointers inside mapped info structure */
+#define	SCREEN_ADJ_MAPPED_INFO 	_IOR('q', 1, user_info_t *)
+
+	/* Initialize anything that needs to, hw-wise */
+#define SCREEN_INIT		_IO('q', 4)
+
+	/* Position cursor to a specific spot */
+#define SCREEN_SET_CURSOR	_IOW('q', 2, screen_point_t)
+
+	/* Load Bg/Fg colors for cursor */
+#define	SCREEN_SET_CURSOR_COLOR	_IOW('q', 3, cursor_color_t)
+
+	/* Load cursor sprite, small cursor form */
+typedef unsigned short cursor_sprite_t[32];
+
+#define	SCREEN_LOAD_CURSOR	_IOW('q', 7, cursor_sprite_t)
+
+	/* Load cursor sprite, large 64x64 cursor form */
+typedef char cursor_sprite_long_t[1024];
+
+#define	SCREEN_LOAD_CURSOR_LONG	_IOW('q', 13, cursor_sprite_long_t)
+
+	/* Modify a given entry in the color map (VDAC) */
+#define	SCREEN_SET_CMAP_ENTRY	_IOW('q', 12, color_map_entry_t)
+
+	/* Return some other information about hardware (optional) */
+typedef struct {
+	int	frame_width;
+	int	frame_height;
+	int	frame_visible_width;
+	int	frame_visible_height;
+} screen_hw_info_t;
+#define	SCREEN_HARDWARE_INFO	_IOR('q', 23, screen_hw_info_t)
+
+	/* Screen-dependent, unspecified (and despised) */
+#define	SCREEN_HARDWARE_DEP	_IO('q', 24)
+